package com.djzhou.gmms.util.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SessionFilter implements Filter {

	public void destroy() {
		
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain filter) throws IOException, ServletException {
		HttpServletRequest httpRequest = (HttpServletRequest)request;
		HttpServletResponse httpResponse = (HttpServletResponse)response;
		if(httpRequest.getSession().getAttribute("sessionUser")==null){
			httpResponse.sendRedirect(httpRequest.getContextPath()+"/login.jsp");
		}else{
			filter.doFilter(httpRequest, httpResponse);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		
	}

}
